Spring bed-bottom



(No Model.)

T. BRDICK.

SPRINGBBD BOTTOM. SNO. 255,837. Patented Apr. 4.18182.

UNITED STATES PATENT Erica.

THEODORE BURDICK, OF GRAND HAVEN, MICHIGAN.

SPRING BED-BOTTOM.

SPECIFICATION forming part of Letters Patent No, 255,837, dated April 4,1882. Application tiled December 5, 1881. (No model.)

To all whom it may concern Be it known that I, THEoDoEE BUEDroK, acitizen ofthe United States, residing at Grand Haven, in the county ofOttawa and State of Michigan, have invented a new and useful SpringBed-Bottom, of which thefollowing is a specification.

My invention relates to improvements in woven-wire spring bed-bottoms inwhich a fabric of woven wire is used in connection with frames or otherdevice for the purpose of producing the elastic properties of the bedand the objects of my improvements are, tirst, to avoid the necessityot' using heavy wooden frames for `the purpose of supporting the fabricand holding it at the proper tension 5 second, to afford facilities forthe proper adjustment of the fabric in such manner that it will maintaina proper tension and elasticity under all circumstances; and, third, toso equalize and adjust the tension as to avoid the dangers of warping ortwisting out of shape common with the ordinary woven-wire springbed-bottom. I attain these objects by the mechanism illustrated in theaccompanying drawings, in which- Figure 1 represents a surface View ofmy spring bed-bottom; Figs. 2 and 4t represent side views of thebed-bottom before the proper tension is given. Fig. 3 is a side view ot'the same when at full tension and ready for use. Figs. 5 and 6 are theend cleats to which the fabric is attached. p Similar letters refer tosimilar parts throughout the several views. The fabric A A, the spiralsprings B B, the longitudinal slats C C, and the cross-cleats D Dconstitute the frame-work and elastic portion of the bed bottom. The endor cross cleats D D are made of wood or other material, and may be madesolid, as in Figs. 2 and 5, with slots G to receive the ends ofthelongitudinal slats C; or they may be made in several separate cleats,as represented in Figs. 4. and 6, D D, with the longitudinal slats Cbetween the crosscleats D D at Gr.

The fabric A is attached to the cross-cleats D D by being Vplacedbetween the cleats D D and the crossslats d d, which form part of thecleats D, and held in position by bolts E E or other device at one endand passing round the cleat D at the other end, as represented iii Fig.2, in which case the upper and lower fabric, A A, ofv woven wire iswoven in one continuous sheet; or the fabric may be woven in twoseparate sheets, AA, as represented in Fig. 4, and attached to thecross-cleats D D d d at both ends. After having secured my fabric A atthe'ends to the cleats D d and given it the proper strain I insert mylongitudinalslats C G, and make all fast at D D by the use of the boltsor other device E E. I then insert my spiral springs B B, as shown inFig. 3, thus sustain,- ing and equalizing the tension of-t-he fabric AA. It will be seen that by this means every pound of weight that isbrought to bear upon the upper fabric is transmitted to and borne by thelower fabric by means of the longitudinal slats C C and the spiralsprings B B. t

I am aware that prior to my invention spring bed-bottoms have been madein which wovenwire fabric is used in conjunction with spira-l springs,&c. I therefore doA not claim. such a combination, broadly; but

What I do claim as my invention, and desire to secure by Letters Patent,is Y The combination, in woven-wire spring bedbottoms, of two fabrics ofwoven wire, A A, attached to cross-cleats D D, supported by longitudinalslats G G, with two sets of spiral springs, B B, one spring B beingplaced upon the upper side of each slat C and extending to and`supporting the upper sheet of woven- Wire fabric A, and one spring Bbeing placed upon the under side'of each slat C and extending to andsupporting the lower fabric A, as represented in Figs. l and 3 byletters A A, B B, and O C.

THEODORE BURDICK.

Witnesses:

ITHIEL J. CILLEY, WM. WALLACE.

